11

Status of Neutrino Beamline Construction

T.Kobayashi

IPNS, KEK

Jan.8, 2008J-PARC PAC

2

2

Preparation SectionPreparation Section

SCFM at ARC SectionSCFM at ARC Section

Target-Horn SystemTarget-Horn System

Target StationTarget Station

Decay VolumeDecay VolumeBeam DumpBeam Dump

Final Final FocusingFocusingSectionSection

Muon Muon Monitoring PitMonitoring Pit

Near Neutrino DetectorNear Neutrino Detector

295km to 295km to Super-KamiokandeSuper-Kamiokande

The Neutrino Beam-LineThe Neutrino Beam-Line

100m100m

Construction: Apr. 2004 ~ Mar. 2009 (5yrs)

T.Kobayashi (KEK)

Summary of StatusSummary of StatusConceptual Design

Engineering Design

Real Production

Installation

Proton Beam monitor Feb.~

Superconducting magnets Feb~

Cryogenics Apr~

Normal Conducting magnets

Vacuum system

Target Aug.~

Horn Aug.~

Target Station

Beam Window Jul~

Decay Volume

Beam Dump Aug~

Muon monitor 08/09

• All components are in production phase• Installations is starting as scheduled

44

Primary beam linePrimary beam line

• Preparation section– NC magnet,2D(H),5Q,4str– 750W loss

• Arc section– 28 superconducting combined

function magnets – D2.6T,Q18.6T/m, L=3.3m– 1W/m loss

• FF section– NC, 2D(V), 4Q, 4str– 250W loss

• Bending– H: 84.5o

– V: 3.1~3.6o downward in FF sect. (OA angle 2~2.5o)

• Proton beam monitors– Intensity, Profile, Position, Loss

55

Tunnel for Primary Beam-lineTunnel for Primary Beam-line

50GeV

Preparation Section

Preparation Section

Arc SectionFinal Focus Section

Extraction area

Completed in Dec. 2006

66

Primary line componentsPrimary line components

Level-measurement for the primary tunnelbein done.

Delivery of superconducting magnet (doublet)• SC magnets

– 23 (/28) mags, 9 (/14) “doublets” completed– Up to 28 mags, 12 dblt’s in FY2007 (by Mar.2008)– Corrector mags being fabricated at BNL

• Normal-conducting magnets– 11 mags in prep.section installed and aligned.– Fabrication of FF mags in progress, inst. In 2008

• Misc.– Level meas. in progress to monitor ground sink.

77

Proton beam monitorsProton beam monitors• Position: ESM

– 9 prep ESMs delivered– ARC ESMs being manufactued

• Profile: SSEM – Chambers and Moving mechanisms

for Prep SSEMs delivered, installation in this FY.

– Chambers and Moving mechanisms for SC part will be manufactured soon

– SSEM sensor will be assembled/installed in the next FY

• Intensity: CT– Final design fixed– All parts are ordered– Prep CTs will be assembled/installed

in this FY

• Loss: Ionization chamber– Commercially available (used by J-

PARC acc group)– Layout/configuration fixed– Twenty monitors are purchased in

this FY

88

TargetTarget

Graphite outer tube.

Core rod is inside this tube.

Ti-alloy container

• Graphite 26mm(D)x900mm(L)• Forced flow Helium gas

cooling in Ti-alloy container• Remotely exchangeable• Full-spec He flow test w/

mockup succeeded• Day-1 target delivered.• Full-spec He-flow test w/ real

target being prepared

9

Electromagnetic hornsElectromagnetic horns

1st Horn3rd Horn

• Long term test at 320kA with 1st horn prototype and 3rd horn finished– Minor problems are indentified and being fixed before day-1.

• The 1st Horn for day-1 is under production, will be delivered in Mar.• The 2nd Horn is under production in US, will be delivered in April.

106

1.3x106

4.3x105

1st horn

3rd horn

10

Full setup Test of Horn and Demonstration of

its Remote Maintenance Scenario at Fuji, KEKIn preparation now.

The 320 kA operation is scheduled in February.

Necessary improvements are identified and being solved.

3rd Horn

Support Module

Full Setup

Hung by remote sling tool

11

p beam

horns

pions

target

To decayvolume

Iron shield

Concreteshield

He vesselTTarget Stationarget Station

• Overcame water food problem during excavation in early 2007• Installation of the helium vessel(~470ton, 1000m3) finished, passed

vacuum test in Nov. 2007 as scheduled• Construction of surface building starts soon and will finish in June 2008.

1212

Decay VolumeDecay Volume• 94m-L iron helium vessel cooled by water• Middle part was constructed in 2005.• Upstream part (20cmt Iron) was installed&tested in Nov 2007 as scheduled• Downstream parts will be finished by Aug. 2008.

Feb. 2005

3NBT

6m厚コンクリート躯体

ディケイボリューム９４ｍ ビームダンプターゲットステーション

Middle part Upstream part Downstream part

Sep. 2007Dec. 2007

1313

Beam DumpBeam Dump

• 98 graphite blocks cooled by water-pipe embedded Al-casting block• Layout of pipes & Al-casting method developed and established• All parts are in production and will be ready by the end of Mar.2008

– Graphite blocks being machined, ~1/4 delivered– First Al-cooling module delivery in Jan (out of 14) – Helium vessel iron plates (200mmt)

• Module assembly will be finished by the end of Mar.2008• Installation from Aug. 2008

Beam dump

Module assemblyPrototype module

14

Muon MonitorMuon Monitor• Spill-by-spill monitor for the muon profile center (= beam direction)• Long term test of prototype at FNAL/NuMI beamline (FNAL-T968 test exp.)• Engineering design of detectors almost finished• Design of the support structure ongoing• Installation in fall-winter 2008

Si PIN diode array

Ionization chamber array

Beam

T2K prototype detectorsinstalled behind NuMI/MINOS MUMON

Si signal vs NuMI intensity

T968 preliminary

IC signal/proton after correction with pressure

3days

1%

15

Construction schedule

• Beam will start in April 2009, 15month from now.• Installation of almost all components in 2008

– SC magnets from Feb, Target/Horn from July, – SC/Horn in-situ ope. test from 2009, Intrlock inspection Mar. 2009

• Schedule is tight– Need careful coordination with civil construction/accelerator commissioning schedule

• but WE CAN DO (if requested budget is secured).

MR beam MR beam MR beam

Rad.Wall

SC magnet system installation/ piping/ cabing Inspection SC magnet systgem testNC magnet instllation/ piping/ cabling

PowerSupply Inst. PowerLine Inst. SignalLine Inst.NC magnet test

Monitor&Vacuum Installation Monitor&Vacuum Installation Monitor&Vac Test

Cable rackElecWater

NU1 building Air cond.PPS test

ＰＰＳNU2 building NU2 yard

TS buildingTS yard

craneel;ec.waterAir con.

He vessel inst test inst testTarget/ horn Installation/ Operation test test

ＰＰＳ

DVBD civil DVBD civil NU3 buildingNU3 yardElec ＰＰＳWater Bury dump

instＤＶ DV piping Air con. testBD inst

Civil Utility Beam line components installation Test Personel protection system inspection

7 10 1 4H19(FY2007) H20(FY2008) H21

1 4

Hadron beam

Neutrino Beam

Primaryline

Secondaryline

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Hadron production measurements at CERN-SPS NA61 (SHINE) experiment

Thick target

Thin target

• Measure hadron (/K) production from Graphite target– to predict

• Near and far energy spectra (<2~3%)• Near to far spectrum extrapolation (<2~3%) e contami. (from K, ) (<2~3%)

• First data taking successfully finished in Oct., 2007 (1month)– Beam: 30GeV proton– Thin target (2cmt 4%int ):~ 500k int.– Replica target (90cm, 80%int): ~180k int.

• (Goal: 1M int. for both)– Intense analysis started

• Measurements in 2008 planned– DAQ rate: ~1Hz ~100Hz

17

RRequest for beam 2009-2010equest for beam 2009-2010

• In the 1st J-PARC PAC, T2K is approved with

– to achieve T2K goal sin2213=0.008 (90%CL, =0) in ~5yrs (w/ design intensity)

• Highest priority in the first few years is– To reach the highest sensitivity, and– To publish the physics results

• We set our first goal– Sensitivity of better than current upper bound ~0.14

(90%CL, CHOOZ)

• To achieve this goal, we request– 100kW x 107s beam by around summer 2010

(Proposal)

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SummarySummary• Many milestones achieved in 2007

– Water problem during TS excavation fixed and UG part completed on schedule

– Huge Helium vessel of TS installed and passed vacuum test on schedule

– Long term full-current test of 1st and 2nd horn done– Horn full-system support test. (Operation test soon)– Day-1 Target Delivered, etc,…

• Beam line construction is on schedule • Installation of most components in 2008

– SC mags inst. from Feb, Tgt/Horn from July, etc.– Careful coordination and hard work necessary

• We can start beam in Apr. 2009– If requested budget is secured

• Request 100kW x 107s beam by around summer 2010– To reach world highest sensitivity, and– to publish first physics result in 2010